Stuffing-box for elastic-fluid turbines.



No. 897,189. PATENTED AUG. 25, 1908.

G. BELLUZZO.

STUFFING BOX FOR ELASTIC FLUID TURBINES.

APPLICATION FILED NOV. 12, 1906.

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STUFFING-BOX FOR ELASTICFLUID TURBINES.

Specification of Letters Patent.

Patented Aug. 25, 1908.

Application filed November 12. 1906. Serial No. 343.111.

To (1U -Hzom 'it 'may cencfrn.'

Be it known that l, (hr'snrrr. BELLVZZO, mechanical engineer, subject of the King of italy, residing at l Via Paolo Frisi, Milan, ita-lv, have invented certain new and. useful vimpr( venients in Shilling-Boxes for Elastic- Fluid Turbines; and l do hereb \Y declare the following to be a. full, clear, and exact description of the inventiol'l, such as will enable others skilled in the art. to which it appertains to make and use the same.

The stuffingr box for elastic Vluid turbines which forms the objectof the present invention is represented in Figures l and 2 of the accompanying drawing in longitudinal section and in front elevation respectively.

Upon the shaft -(1,-o--- of the turbine a sleeve -Abpresenting a tapering, stepped form is fixed. Projections l, 2, 3, 4 on a box ed enter channels formed between projections l, Il, IU, lV on this sleeve with very slight play; thisbox is made in two parts and is fixed to the turbine casing wif-M. The ring (Z# which. is also formed in several parts for constructional reas/ons is fitted to the box -c. Some of the annular projections on the sleeve are cut awa,Y as shown in broken lines in Fig. L. Through the tube fv water enters the groove --vf/A- of the movable. sleeve -b--. rl`his water may be that which'escapes from the distributer of the regulating servomotor or that arising from the condensations which collects in certain parts of the engine. The water is caused by the centrifugal force to adhere to the cylindrical wall of the. groove '-gor of the internal channels in the box -c-. A tight joint is obtained owing to the action, in the direction, opposed to centrifugal force which tends to force the liquid outwards,.of the air which tends to penetrate into the interior. The water which is ordinarily able to escape through the labyrinth formed by the various projections is very small in quantity and as on its discharge it has a tempera ture greater' than that of the steam in the condenser, it becomes converted into steam.

The greater the velocity at the periphery in the smaller the number of the channels I, H ma)Y be and therefore the smaller the length of the stuffing box.

Having now particularly described and ascertained the nature of my said invent-ion and in what manner the same is to be performed, I declare. that what l claim is 1. In a stulhng box for turbines, the coinbination, of two relatively rotative members having interrupted compleinentary surfaces cti-acting to form an interior lab \'ri1itliian channel. and means for introducing hot water to said channel,

2. ln a stntlinel box for turbines, the combination, of two relatively rotative members having complementary conical surfaces coacting` to form an interior conical channel, and means for introducing` fluid to saidchannel at its larger end.

$3. ln a stulling box for turbines, the conibination, of two relatively rotative members havinginterrupted complementarv conical surfaces co-acting to form an interior labyrinthian channel, and means for introducing` llnid to the said channel.

4. in a stulling box for turbines, the combination, with an inner rotary member having an interrupted surface, of an outer member having an inner complementary surface, the two surfaces co-acting to form an interior labvrinthian channel, and means for introducing hot water to said channel.

5. ln a stulling box for turbines, the combination, with an inner rotaryv conical member having' a surface interrupted in the direction of its axis, of an outer member having an inner complementar)v surface, the, two surfaces cli-acting to form an interior labyrinthian channel, and means for introducing -[luid into the terminus of said channel.

6. In a stuffing box for turbines, the conibination, with an inner rotary conical member having a surface interrupted in the direetion of its axis by successive ribs and grooves occupying planes substantially at right an gies thereto, of an outer member having an inner complementary surface, the two surfaces co-acting to form an interior labyrinthian channel, and means for introducing fluid to the inner terminus of said channel at the base of the cone.

7. In a stuffing box for turbines, the coinbination, with an inner member fixed to the rotor shaft and having an outer conical surface interrupted in the direction of its axis by a series of spaced ribs, of an outer stationary member having an limer surface conn plementarv to that of the rotary member and co acting therewith to form an interior ,labyrinthian conical channel, and means for introducing a fluid to the outer terminus of the channel.

8. In a stutling box for turbines, the combination, with. an inner member fixed to the rotor shaft and having' an outer conical snrface interrupted in the direction of its axis, by a. series ol spaced. ribs and provided in its base with a recess, ol an outer stationary member having an inner surface complementary to that of the rotary member, a flange carried by the outer member and projecting into the recess in the base of the, inner member and interlocking with a portion of the inner member, the adjacent surfaces ot' the members `co-acting; t0 form an interior labyrinthian channel, and means for introducing a iluid to the channel by Way of the recess.

9. In a stufiing box for turbines, the combination, with a rotary member taperingl towards its inner end and having a surl'ace interrupted in the direction of its axis, ol an Outer hollowY member having1 an inner complementary surface, the two surfaces coacting to form an interior labyrinthian channel, and means for introducing a liquid to the outer terminus of said channel.

10. ln a stuiling' box for turbines, the com'- bination, with an innerineniber iixed to the, rotor shalt and haring` an outer conical surl'ace tapering towards the turbine and interrupted in the direction oi' its` axis by a series 0l' spaced ribs and provided in its base with a recess, ol an outer stationary member haviney au inner surface complementary to thatot' the rotary member, a ilangc carried by the outer member and lnojeeting into the recess in the base ol" the inner member, the adjacent 

